KASSIM, Asma; YUSUF, Salama; USSI, Abdalla; OMAR, Moza. Impact of Zanzibar Investment Promotion Authority Approved Projects on Gross Domestic Product of Zanzibar. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 56, n. 2, p. 253–262, 2021. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/12267. Acesso em: 18 sep. 2025.